OBJECTIVE LIFE SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Prokaryotic cells came before Eukaryotic cells
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Eukaryotic cells do not have a nucleus, Prokaryotic cells do
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Prokaryotic cells are bigger than Eukaryotic cells
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Eukaryotic cells are simple, Prokaryotic cells are complex
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Detailed explanation-1: -So the correct option is ‘prokaryotes evolved before eukaryotes’.
Detailed explanation-2: -Answer and Explanation: The following statement is true regarding prokaryotes and eukaryotes: c) Both prokaryotes and eukaryotes have ribosomes. Ribosomes are cell organelles that are responsible for the protein synthesis for the cell.
Detailed explanation-3: -Prokaryotes came first, with speculations stating that they appeared at least 3.8 billion years ago. Prokaryotes are underdeveloped cells, undifferentiated organelles with no nuclei. They have circular DNA. It suggests that prokaryotes evolved first.
Detailed explanation-4: -Both prokaryotes and eukaryotes have chromosomes, although prokaryotic chromosomes are usually circular and not enclosed within a nucleus, while eukaryotic chromosomes are linear and located within the nucleus. So, the correct answer is: Prokaryotes lack membrane-bound nucleus while eukaryotes do not.
Detailed explanation-5: -According to the endosymbiotic theory, the first eukaryotic cells evolved from a symbiotic relationship between two or more prokaryotic cells. Smaller prokaryotic cells were engulfed by (or invaded) larger prokaryotic cells.